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並前往https://serverfault.com/questions/155085/grep-question-how-to-filter-several-type-of-patterns

grep question, how to filter several type of patterns? - Server ...

You can escape the pipe and put the pattern in quotes: grep "aaa\|bbb". or use -E : grep -E "aaa|bbb". or grep -E aaa\|bbb.

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